Airworthiness Directives; The Boeing Company Airplanes
We propose to adopt a new airworthiness directive (AD) for certain The Boeing Company Model 737-100, -200, and -200C series airplanes. This proposed AD was prompted by a report of a severed upper butt strap, and cracks in the forward skin and bonded doubler, on one airplane. This proposed AD would require repetitive inspections for cracks and a chemical spot test in the area of station (STA) 908, and related investigative and corrective actions, if necessary. For certain airplanes, this proposed AD would require an inspection and modification. We are proposing this AD to prevent cracks at the adjacent mating skins (forward and aft), which could initiate just above stringers S-4R and S-4L; and could grow and result in a decompression event.
Agency Information Collection Activities: Requests for Comments; Clearance of New Approval of Information Collection: Commercial Aviation Safety Team Safety Enhancements
In accordance with the Paperwork Reduction Act of 1995, FAA invites public comments about our intention to request the Office of Management and Budget (OMB) approval for a new information collection. The Federal Register Notice with a 60-day comment period soliciting comments on the following collection of information was published on August 4, 2011, vol. 76, no. 150, page 47287-47288. The FAA intends to collect safety-related data regarding the voluntary implementation of Commercial Aviation Safety Team (CAST) safety enhancements (SEs) from certificate holders conducting operations under 14 CFR Part 121 and Parts 121/135.
Modification of Class E Airspace; Billings, MT
This action modifies Class E airspace at Billings Logan International Airport, Billings, MT. Controlled airspace is necessary to accommodate aircraft using Area Navigation (RNAV) Global Positioning System (GPS) standard instrument approach procedures at Billings Logan International Airport. This action will also make a minor adjustment to the geographic coordinates of the airport. This improves the safety and management of Instrument Flight Rules (IFR) operations at the airport.
Modification of Class D and Class E Airspace and Revocation of Class E Airspace; Bellingham, WA
This action modifies Class D and Class E airspace at Bellingham, WA, to accommodate aircraft departing and arriving under Instrument Flight Rules (IFR) at Bellingham International Airport. This action, initiated by the biennial review of the Bellingham airspace area, enhances the safety and management of aircraft operations at the airport.
Proposed Amendment of Class D and E Airspace; Lewiston, ID
This action proposes to modify Class E airspace at Lewiston- Nez Perce County Airport, Lewiston, ID. Controlled airspace is necessary to accommodate aircraft using Area Navigation (RNAV) Global Positioning System (GPS) standard instrument approach procedures at Lewiston-Nez Perce County Airport, Lewiston, ID. The geographic coordinates of the airport and navigation aids also would be adjusted in the respective Class D and Class E airspace areas. The FAA is proposing this action to enhance the safety and management of aircraft operations at Lewiston-Nez Perce County Airport, Lewiston, ID.
Airworthiness Directives; Bombardier Inc. Airplanes
We are superseding an existing airworthiness directive (AD) for certain Bombardier Inc. Model CL-215-1A10 and CL-215-6B11 (CL-215T Variant) airplanes. That AD currently requires repetitive inspections to detect cracking of the lower cap of the wing front and rear spars at wing station (WS) 51.00, and the wing lower skin. Additional actions, if cracking is found, include reworking the lower cap of the front or rear spar, inspecting for cracking, and repairing any cracking. The existing AD also requires reporting inspection results. This new AD requires extending the inspection area of the rear spar lower cap from WS 51.00 to WS 49.50 and modifying the ultrasonic inspection calibration procedure. This AD was prompted by reports of cracking found outside the inspection area. We are issuing this AD to detect and correct cracking of the lower caps of the wing front and rear spars, and lower wing skin, which could result in reduced structural integrity of the airplane.
Airworthiness Directives; The Boeing Company Airplanes
We are adopting a new airworthiness directive (AD) for all The Boeing Company Model 777 airplanes. This AD was prompted by four reports of retaining cross bolt hardware not fully engaged into the fuse pins of the forward trunnion lower housing of the main landing gear (MLG), which could result in an incorrect MLG emergency landing break-away sequence. This AD requires a detailed inspection of the fuse pin cross bolts and fuse pins of the left and right MLG forward trunnion lower housing to verify that the cross bolts are correctly installed and that there are no missing fuse pins, and replacement of the fuse pins if necessary. We are issuing this AD to prevent an incorrect emergency landing MLG break-away sequence, which could result in puncturing of the wing box and consequent fuel leaks and an airplane fire. Failure of the fuse pins could also result in a possible landing gear collapse causing a runway excursion during take-off or landing.
Airworthiness Directives; Eurocopter Deutschland GMBH Helicopters
We are adopting a new airworthiness directive (AD) for Eurocopter Deutschland GMBH (ECD) Model MBB-BK 117 C-1 and C-2 helicopters. This AD requires installing a placard that corresponds to the maximum permissible flight altitude, amending the Rotorcraft Flight Manual (RFM) to revise the maximum permissible operating altitude, and inserting revised performance charts into the RFM. This AD also requires a repetitive maintenance ``MAX N1 CHECK'' to determine the appropriate maximum altitudes. This AD also requires, if the engine or a Fuel Control Unit (FCU) or module 2 or 3 is replaced, repeating the maintenance ``MAX N1 CHECK.'' Finally, this AD specifies that modifying both engines would provide terminating action for the AD requirements. This AD was prompted by the failure of a ``few'' engines to reach the specified one-engine-inoperative (OEI) rating at altitudes above 10,000 feet. The actions of this AD are intended to prevent flights at altitudes where the full OEI engine power cannot be reached and subsequent loss of control of the helicopter if an OEI operation is required.
Airworthiness Directives; Burkhart GROB Luft- und Raumfahrt GmbH Powered Sailplanes
We are adopting a new airworthiness directive (AD) for all Burkhart GROB Luft- und Raumfahrt GmbH Models GROB G 109 and GROB G 109B powered sailplanes. This AD results from mandatory continuing airworthiness information (MCAI) issued by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as excessive corrosion on the nose plate in the vertical stabilizer, which could cause the vertical stabilizer nose plate to fail. We are issuing this AD to require actions to address the unsafe condition on these products.